I recently decided to make the switch from a Canon DSLR to a Canon R mirrorless. It was easy to learn since I'm already used to Canons. I bought the EF to RF adapter (with the adjustable ring) so I could use my DSLR lenses with it. My only complaint is that Canon should give you the adapter free (they used to!) when you buy the camera. So far, it's taking good photos, and I decided to buy the kit lens that goes with the camera, so I can use it for all-around use when I'm out and about. I have a very nice Sigma macro lens that I bought at the same time, which needs the EF to RF adapter, but it takes very nice macros on this camera. I'm glad I bought it.

Nice adapter with good autofocus...we can use all canon DSLR lenses..

I am a hobbyist at best. I have had my Canon DSLR for about 5 months now and I wanted a lens to take better photos of my kids. This lens does not disappoint. It excels at taking rather close portraits in low light. I then use a free photo editor that I found online to tweak them. It move super slow, though, so it's not suitable for pets (except the time I got lucky above) or sports. I highly recommend this lens. I haven't had it that long so cannot speak to it's durability.

T-ring fit my Canon DSLR camera perfectly. The combination of T-adapter to the T-ring was also perfect. Unfortunately that combination did not allow the telescope to provide a functional focus option. Still searching for solutions.

Perfect with an adapter for my Canon SX40. Thanks!

Bought it for my wife, she loves it. Great starter for someone wanting to step up to DSLR.

As a Canon DSLR shooter this adapter is a must for owning the EOS M. It's really the only reason why I bought the EOS M. I love the 22mm f2 that comes with it, but being able to use my nearly $10k worth of lens on this makes it a steal. I believe without this adapter the camera is very limited. The adapter fits the camera and lens nicely. I personally feel that the lense attaching to the EOS M feels strange, tight compared to all my DSLRs, but this adapter and lens are snug once attached, and that's what matters.

Admission: I'm a complete newbie to photography. I had to take a class that required a DSLR camera. I looked around, and the cheapest ones for purchase at stores in my area were $700-800. Way more than I wanted to spend. I bought a Nikon D1 (I later found out this camera was first issued in 1999) for $100 off ebay, and lo and behold, the thing didn't even work anymore. I sent it back to the seller and got a refund. But, I still needed a camera. The Canon Rebel T3 was the cheapest one out there, yet Canon is always a reliable brand, so I knew I wouldn't be disappointed, and so far, everything has been good. Very easy to set up and meter shots, although the camera is very very picky about focusing, especially when shooting landscapes. It will not let you take the shot unless everything is as clear as possible. The Rebel is most definitely less complicated and much more user friendly than almost any other DSLR camera out there, which is definitely good for those like myself who have never used anything other than point-and-shoot cameras prior to purchasing the Rebel. The price...errrr, maybe it could be a bit lower. $350-375ish (and not $499) would be appropriate. I paid $400, which I think was "fair." I'd recommend it to anyone - seems like a great, and relatively lightweight, camera for someone taking photos while on vacation, where a heavy/bulky DSLR would be inconvenient.